Crank Protocol

leverage_long

Destructive

Open a lending-based leveraged long by looping deposit -> borrow stable -> buy more -> redeposit.

Returns an ORDERED STEP PLAN of UNSIGNED base64 txs, effective leverage, loop count, health factor, and a position_id. amount in base units. The levered token is authenticity-verified first; set allow_unverified=true to lever an unverified mint at your own risk. Past the daily free tier an x402 payment_header is required.

jurisdiction: leverage is geo-gated too -- see short_open.

idempotency_key (optional): a client-generated UUID. Retrying with the same key + same args replays the original result instead of re-opening the leveraged position.

Input Schema

TableJSON Schema

Name	Required	Default
`ip`	No
`token`	Yes
`amount`	Yes
`market`	No
`protocol`	No	kamino
`caller_id`	No
`jurisdiction`	No
`pay_in_crank`	No
`slippage_bps`	No
`stable_token`	No
`payment_header`	No
`wallet_address`	Yes
`idempotency_key`	No
`target_leverage`	Yes
`allow_unverified`	No
`marginfi_account`	No

Output Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedAug 12, 2026

addedInput schema / properties / ip

Added value: +{
+  "default": "",
+  "type": "string"
+}

addedInput schema / properties / jurisdiction

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null
+}

First observedJul 27, 2026

TDQS

A4.4/5.0

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

The description discloses multi-step looping behavior, unsigned base64 step plan, authenticity verification, unverified-token risk, x402 payment requirement past free tier, geo-gating, and idempotent replay via idempotency_key. This goes well beyond the annotations (readOnly false, destructive true) and provides actionable risk and execution context. No contradiction with annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Five compact sentences, each carrying distinct information: purpose, return shape, verification/risk, payment, jurisdiction, idempotency. Formatting with backticks draws attention to parameter names. No fluff.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a 16-parameter, multi-step leverage tool, the description covers purpose, key required-param semantics, risk, payment, and idempotency, and references the output schema for return details. Optional params like pay_in_crank and marginfi_account remain undefined, which is a minor gap. Overall enough for a typical invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With 0% schema coverage, the description compensates for several params: amount in base units, allow_unverified, payment_header, jurisdiction, idempotency_key. However, cryptic optional params like pay_in_crank, marginfi_account, stable_token, and target_leverage semantics are not explained. Partial compensation only.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description opens with a specific verb and mechanism: 'Open a lending-based leveraged long by looping deposit -> borrow stable -> buy more -> redeposit.' This clearly distinguishes it from short/perpetual/swap siblings. Return-value summary further clarifies scope.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It gives clear context for when this tool applies: any lending-based leveraged long request. It cross-references short_open for geo-gating, but does not explicitly route to alternatives like perp_open_long or leverage_close. The intended use is implied by name and mechanism rather than explicitly contrasted.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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